| Abbreviations | Meaning |
 | REM | Rapid Eye Movement; Recent-event Memory; Reticular Erythematous Mucinosis; Return Electrode Monitor; Roentgen-equivalent-man |
| PETT | Pendular Eye-tracking Test; Positron Emission Transverse Tomography |
| PP | Peyer Patches |
| RD | Reye Disease |
| HSM | Health System Model; Heparin Surface-modified [intra-ocular Lens]; Hepatosplenomegaly; Hierarchical Storage Management; Holosystolic Murmur |
| MULIBREY | Muscle-liver-brain-eye Nanism Or Dwarfism |
| MOC | Maximum Oxygen Consumption; Metronidazole, Omeprazole, Clarithromycin; Multiple Ocular Coloboma |
| NOP | No Ocular Pain; Not Otherwise Provided For |
| CRP | Corneal-retinal Potential |
| NREM | Nonrapid Eye Movement [sleep] |
| LLL | Left Lower [eye]lid |
| RS | Reye Syndrome |
| EO | Early-onset; Eosinophil; Ethylene Oxide; Eyes Open |
| ICE | Ichthyosis-cheek-eyebrow [syndrome] |
| IL | Intraocular Lens |
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